SEARCH · Engineering Papers
Results for “OXIDES”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Kinetics of Ion Exchange of Zr/Sn(IV) Phosphonate–Phosphate Hybrid Materials for Separation of Lanthanides from Oxidized Actinides
The kinetics of ion exchange of Zr/Sn(IV) phosphonate-phosphate hybrid ion exchange materials have been studied with several types of ions of specific interest to nuclear fuel recycling including Nd 3+ at 4.5 and 43 mM and NpO 2 + at 2.9 mM spanning multiple HNO 3 concentrations. In most cases the equilibrium was reached in less than 12 h. The ion exchange behavior followed that of pseudo first-order adsorption with rates ranging from 0.430–4.10 h -1 and 0.290–0.435 h -1 for Nd 3+ and NpO 2 + , respectively. A separation with both Nd 3+ and NpO 2 + present was performed, resulting in separation factors of 1.9–12, 1.7–6.6, and 2.0–5.7 at 1×10 -1 , 1×10 -2 , and 1×10 -3 M HNO 3 , respectively.
Concomitant thionation and reduction of graphene oxide through solid/gas metathetical sulfidation reactions at high temperatures
Explore the source record for details and available documents.
Semiconducting Transition Metal Oxides; Article No. 283203
Explore the source record for details and available documents.
Elemental and lattice-parameter mapping of binary oxide superlattices of (LaNiO 3 ) 4 /(LaMnO 3 ) 2 at atomic resolution
We construct the elemental distribution and lattice strain maps from the measured atomic column positions in a (LaNiO3)(4)/(LaMnO3)(2) superlattice over a large field of view. The correlation between the distribution of B-cations and the lattice parameter in the form of Vegard's law is validated using atomic resolution energy dispersive x-ray spectroscopy (EDS). The maps show negligible Mn intermixing in the LaNiO3 layer, while Ni intermixing in the LaMnO3 layer improves away from the substrate interface to 9.5 atomic% from the 8th period onwards, indicating that the superlattice interfacial sharpness is established as the distance from the substrate increases. The maps allow an observation of the compositional defects of the B-sites, which is not possible by Z-contrast alone. Thus, this study demonstrates a promising approach for atomic scale correlative study of lattice strain and composition, and a method for the calibration of atomic resolution EDS maps.
Machine learning improves predictions of agricultural nitrous oxide (N 2 O) emissions from intensively managed cropping systems
Not provided.
Photoionization Cross Section of 1s Orthoexcitons in Cuprous Oxide
Explore the source record for details and available documents.
Surface energetics of alkaline-earth metal oxides: Trends in stability and adsorption of small molecules
Explore the source record for details and available documents.
Improved description of metal oxide stability: Beyond the random phase approximation with renormalized kernels
Not Available
Improper ferroelectricity at antiferromagnetic domain walls of perovskite oxides
Not Available